Calling Sql Procedure from data template

Question

Hello,
I am facing problem to call a stored procedure which inserts data into DB when a report is generated.
I tried to use data trigger before report, It did not call the procedure nor it gave any error.
I looked into thread dataTrigger beforeReport doesn't fire
and used the defaultPackage = "SEQUENCE_NUMBER", I am getting error parameter not declared
listing all the parameters declared in my XML.
Below is my data template
<dataTemplate name="HURDetail" dataSourceRef="BRM_DATA_SOURCE">
     <parameters>
          <parameter name="PARAM_REPORT_TYPE" dataType="character" defaultValue="%"/>
          <parameter name="PARAM_ROAMING_PART_NAME" dataType="character" defaultValue="%"/>
          <parameter name="PARAM_START_DATE" dataType="character"/>
          <parameter name="PARAM_END_DATE" dataType="character"/>
     </parameters>
     <dataQuery>
          <sqlStatement name="Q1">
               <![CDATA[
SELECT  
"EVENT_DLAY_SESS_TLCS_T"."SECONDARY_MSID" as MSID,
MIN("EVENT_T"."START_T") DFC,
MAX("EVENT_T"."START_T") DATE_LAST_CALL,
COUNT ("EVENT_DLAY_SESS_TLCS_T"."SECONDARY_MSID") NC,
TO_CHAR( SUM("EVENT_BAL_IMPACTS_T"."AMOUNT_ORIG"),'FM000000000.000') SDR,
"EVENT_DLAY_SESS_TLCS_T"."SVC_CODE" as SVC_CODE,
"IFW_EXCHANGE_RATE"."TO_CURRENCY" as CURR,
"IFW_EXCHANGE_RATE"."EXCHANGE_RATE" as EXC_RATE
FROM
((((SERVICE_T "SERVICE_T" INNER JOIN SERVICE_ALIAS_LIST_T "SERVICE_ALIAS_LIST_T" ON
"SERVICE_T"."POID_ID0" = "SERVICE_ALIAS_LIST_T"."OBJ_ID0")
INNER JOIN (EVENT_DLAY_SESS_TLCS_T "EVENT_DLAY_SESS_TLCS_T" INNER JOIN EVENT_T "EVENT_T" ON
"EVENT_DLAY_SESS_TLCS_T"."OBJ_ID0" = "EVENT_T"."POID_ID0") ON
"SERVICE_T"."POID_ID0" = "EVENT_T"."SERVICE_OBJ_ID0")
INNER JOIN EVENT_BAL_IMPACTS_T "EVENT_BAL_IMPACTS_T" ON
"EVENT_T"."POID_ID0" = "EVENT_BAL_IMPACTS_T"."OBJ_ID0")
INNER JOIN CONFIG_BEID_BALANCES_T "CONFIG_BEID_BALANCES_T" ON
"EVENT_BAL_IMPACTS_T"."RESOURCE_ID" = "CONFIG_BEID_BALANCES_T"."REC_ID")
INNER JOIN IFW_EXCHANGE_RATE "IFW_EXCHANGE_RATE" ON
"CONFIG_BEID_BALANCES_T"."BEID_STR_CODE" = "IFW_EXCHANGE_RATE"."FROM_CURRENCY"
WHERE (   
("EVENT_T"."START_T">=bipext.infstrtotimet(:PARAM_START_DATE,2) AND
"EVENT_T"."START_T"<=bipext.infstrtotimet(:PARAM_END_DATE,2)-1) AND
"SERVICE_ALIAS_LIST_T"."NAME" = :PARAM_ROAMING_PART_NAME AND
"EVENT_T"."SERVICE_OBJ_TYPE" = '/service/settlement/roaming/outcollect' AND
"EVENT_T"."POID_TYPE" = '/event/delayed/session/telco/gsm/roaming' AND
"IFW_EXCHANGE_RATE"."TO_CURRENCY" = 'EUR' AND
bipext.infCheckDates(:PARAM_START_DATE, :PARAM_END_DATE) = 1
     ]]>
     </sqlStatement>
     </dataQuery>
     <dataTrigger name="beforeReport" source="SEQUENCE_NUMBER.Seq_Num_Gen_Proc(:PARAM_START_DATE, :PARAM_END_DATE, :PARAM_ROAMING_PART_NAME, :PARAM_REPORT_TYPE)"/>
     <datastructure>
          <group name="Q1" source="Q1">
               <element name="MSID" value="MSID"/>
               <element name="DFC" value="DFC"/>
               <element name="DATE_LAST_CALL" value="DATE_LAST_CALL"/>
               <element name="NC" value="NC"/>
               <element name="DC_HHHMMSS" value="DC_HHHMMSS"/>
               <element name="SDR" value="SDR"/>
               <element name="SVC_CODE" value="SVC_CODE"/>
               <element name="CURR" value="CURR"/>
               <element name="EXC_RATE" value="EXC_RATE"/>
          </group>
     </datastructure>
</dataTemplate>
Please suggest, How to call a stored procedure

Answer 1

1. Does dataTrigger triggers the procedure only when we execute the report and not when we just view the report ?
2.If I add defaultPackage="HUR_Seq_NUM" in my template I get the error
ORA-06550: line 2, column 13:
PLS-00302: component 'PARAM_REPORT_TYPE' must be declared
ORA-06550: line 2, column 1:
PL/SQL: Statement ignored
ORA-06550: line 3, column 13:
PLS-00302: component 'PARAM_ROAMING_PART_NAME' must be declared
ORA-06550: line 3, column 1:
PL/SQL: Statement ignored
ORA-06550: line 4, column 13:
PLS-00302: component 'PARAM_START_DATE' must be declared
ORA-06550: line 4, column 1:
PL/SQL: Statement ignored
ORA-06550: line 5, column 13:
PLS-00302: component 'PARAM_END_DATE' must be declared
ORA-06550: line 5, column 1:
PL/SQL: Statement ignored